Chimney cowl and ventilator



(No Model.) J. H. BURLEY.

CHIMNEY COWL AND VENTILATOR.

Patented Feb. 11,1890.

GHQ n L Y a transverse sectional View.

UNITED ST TES rFicE.

JOHN H. BURLEY, OF READING, PEN NSYLVANIA.

CHIMNEY COWL AND VENTILATOR.

SPECIFICATION forming part of Letters Patent N 0. 421,094, datedFebruary 11, 1890.

Application filed November 9, 1889. Serial No. 329,715. (No model.)

' To aZZ whom it may concern:

Be it known that 1, JOHN H. BURLEY, a citizen of the United States,residing at Reading, in the county of Berks and State of Pennsylvania,have invented a new and useful Chimney Cowl and Ventilator, of which thefollowing is a specification.

The invention relates to improvements in chimney cowls and ventilators.

The object of the present invention is to simplify and improve theconstruction of chimney cowls and ventilators and render them moredurable and efficacious.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure l is a central vertical sectional view of achimney cowl and ventilator constructed in accordance with theinvention, the adjustable bar, spreading-cone, and vane being shown inelevation. Fig. 2 is Fig. 3 is a similar View.

Referring to the accompanying drawings by letter, A designates acylindrical pipe, which is vertical and communicates with a room orother closed space desired to be ventilated, and is provided near itsupper end with a hanger B, that is arranged inside of the pipe A andsecured to the sides thereof, and is provided with a vertical pivotalstem, which is centrally mounted in the hanger and is adapted to supporta chimney-cowl and allow the latter to rotate to keep its flaring mouthalways into the Wind and insure operation of the device. The cowlconsists of a cylindrical casing D, which has a flaring mouth (Z at itsfront end and an inclined collard at its rear end, to which a reducedcylindrical portion D is attached. Secured at the front of thecylindrical casing D and extending rearward is a conical frustum E,which is the same length as the cylindrical casing B, and its reducedend is somewhat smaller than the portion D of the casing. The conicalfrustum forms a space between it and the cylindrical casing, and adepending vertical tube F,Which is secured to the casing, communicateswith this space, and is slightly larger than the cylindrical pipe A andfits snugly over the lat- 'H is centrally mounted in the open flaringmouth of the casing of the cowl and slides between two plates I and I,which are bent at the center and form a recess '5 to receive theadjustable bar. By sliding the adjustable bar back and forth in therecess 2' of the plates the cowl can be perfectly balanced, and

there will be practically no friction caused by the rotation of thelatter. The air passes through the conical frustum and is intensified bythe reduced end, and is spread by a centrally-arranged spreading-cone Jand exhausts the airin the space between the conical frustum and thecylindrical casing D, producing a partial vacuum, which causes the airto rush up the vertical pipe A, thereby producing complete ventilationof the room or other inclosed space with which the vertical pipe Acommunicates. The spreading-cone J is centrally arranged within thereduced cylindrical portion D of the casing and is secured to a vane K,which is arranged diametrically across the rear end of the cylindricalportion D and holds the flaring mouth of the cowl into the wind andsecuring the operation of the device.

By arranging the vertical pivotal stem within the pipe and dependingtube the stem and the bearings are protected from the weather andprevented from rusting and corroding. By employing a cylindrical casingand a conical frustum a greater draft and a more complete vacuum areinsured.

Having described my invention, what I claim is- 1. A pivoted chimneycowl or ventilator provided with a centrally-arranged and longitudinally adjustable bar, whereby the cowl may be perfectly balanced,substantially as and for the purpose described.

2. The combination of the vertical pipe provided with acentrally-arranged pivotal stem, the cowl consisting of a cylindricaleasing having the conical frustuin arranged therein and provided with adepending tube mounted upon the pipe and a pivotal stem, the plates 1and 1, arranged diametrically across the mouth of the cowl and providedmidway of their ends with bends Z forming a recess, and the adjustablebar arranged in the said recess and adapted to balance the cowl,substantially as described.

3. The combination of the cylindrical casingD, provided with a reducedcylindrical por tion D, the conical frustum arranged within the casing,the vane K, secured diametrically across the'open rear end of thereduced cylindrical portion D and secured within the same, and thecentrally-arranged spreadingcone having its base secured to the vane,substantially as described.

4:. The combination of the pipe A, provided at its upper end with ahanger B, the pivotal stem mounted centrally in the hanger, thecylindrical casing having a depending tube provided with cross-bars Gand G and mounted upon the pipe A, the conical frustum arranged withinthe casing, the vane secured diametrically across the rear end of thecasing and carrying the centrallyarranged spreadingcone, the plates Iand I, and the centrallyarranged bar H, adapted to be adjustedlongitudinally to balance the cowl, substantially as described.

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in presence of two witnesses.

J OIIN l'I. BURLEY. \Vitnesses:

.TNo. P. MILLER, THOMAS 'lRAQEY.

